Abstract :
The Moving Pictures Expert Group (MPEG) within the International Organization of Standardization (ISO) has developed a series of audio-visual standards known as MFEG-1 and MPEG-2. These audio-coding standards are the first international standards in the field of high-quality digital audio compression. MPEG-1 covers coding of stereophonic audio signals at high sampling rates aiming at transparent quality, whereas MPEG-2 also offers stereophonic audio coding at lower sampling rates. In addition, MPEG-2 introduces multichannel coding with and without backwards compatibility to MPEG-1 to provide an improved acoustical image for audio-only applications and for enhanced television and video-conferencing systems. MPEG-2 audio coding without backwards compatibility, called IMPEG-2 Advanced Audio Coding (AAC), offers the highest compression rates. Typical application areas for MPEG-based digital audio are in the fields of audio production, program distribution and exchange, digital sound broadcasting, digital storage, and various multimedia applications. We describe in some detail the key technologies and main features of MPEG-1 and MPEG-2 audio coders. We also present the MPEG-4 standard and discuss some of the typical applications for MPEG audio compression
Keywords :
Hi-Fi equipment; ISO standards; audio coding; channel coding; code standards; data compression; digital audio broadcasting; signal sampling; telecommunication standards; IMPEG-2 Advanced Audio Coding; ISO; International Organization of Standardization; MFEG-1; MPEG audio compression; MPEG digital audio coding; MPEG-2; MPEG-4 standard; Moving Pictures Expert Group; audio coders; audio coding standards; audio-only applications; audio-visual standards; backwards compatibility; digital audio compression; digital sound broadcasting; enhanced television systems; high sampling rates; international standards; multichannel coding; stereophonic audio coding; stereophonic audio signals; videoconferencing systems; Audio coding; Audio compression; ISO standards; Image coding; Image sampling; MPEG standards; Standardization; Standards development; Standards organizations; Transform coding;
